The fact that there was a moat didn’t come as a surprise, but as Paul and the first wave of his attack team stood on the edge of the murky water, looking at an expanse of about eight feet, he was shocked at what he was seeing moving beneath the surface of the water. The low growls and rumbles emanating from the bubbling water didn’t make him feel any more comfortable.

Tentacles sprang from beneath the murky surface every once in a while. There were other forms as well. Some looked like shark fins or snapping jaws. The shadows that past near the surface were all unwelcoming, so the team...